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Finding the Fourth Proportional to 12,791.88, 17,652.72 and 7,126.56

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Solution

The fourth proportional to 12,791.88, 17,652.72 and 7,126.56 is: 9,834.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,791.88 : 17,652.72 = 7,126.56 : x
  2. Step 2: Convert to fraction form
    12,791.88/17,652.72 = 7,126.56/x
  3. Step 3: Cross multiply
    12,791.88x = 17,652.72 × 7,126.56
  4. Step 4: Simplify right side
    12,791.88x = 125,803,168.24
  5. Step 5: Solve for x
    x = 125,803,168.24/12,791.88
  6. Step 6: Final answer
    x = 9,834.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.